system oil大型船用十字头柴油机轴承润滑油
systemn.系统;体系;身体;制度
system subroutine description系统子程序描述
system architecture evolution系统架构演进
system maintenance elementary系统管理元文件
system of conjugated fracture共轭破裂系
system of difference equation差分方程组
system of penalty measurement量刑制度
system of land classification土类分级法
system authorization facility系统认可设施